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Related Experiment Videos

Dentine and enamel bonding agents.

R L Bowen1, M S Tung, R L Blosser

  • 1Paffenbarger Research Centre, National Bureau of Standards, Gaithersburg, Maryland 20899.

International Dental Journal
|September 1, 1987
PubMed
Summary

Researchers found that using aluminum oxalate and aluminum nitrate solutions with N-phenylglycine (NPG) and pyromellitic dianhydride (PMDM) creates strong dental composite bonds. This simplified procedure offers comparable results to previous methods, potentially improving dental adhesion.

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Area of Science:

  • Biomaterials Science
  • Dental Materials
  • Adhesion Science

Background:

  • Sequential application of ferric oxalate (FO), N-phenylglycine (NPG), and pyromellitic dianhydride (PMDM) enhances composite resin bonding to dentin and enamel.
  • Optimizing dental adhesive systems is crucial for long-term restoration success.

Purpose of the Study:

  • To investigate the efficacy of substituting aluminum ions for ferric ions in dental adhesive formulations.
  • To explore simplifications in the application procedure for dental bonding agents.

Main Methods:

  • Utilized aqueous solutions of aluminum oxalate and aluminum nitrate, followed by acetone solutions of NPG and PMDM.
  • Assessed tensile adhesive bond strengths between composite resins and extracted human teeth.
  • Compared experimental adhesive systems with commercially available dentin bonding agents.

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Main Results:

  • Aqueous solutions of aluminum oxalate and aluminum nitrate, followed by NPG and PMDM, produced strong tensile adhesive bond strengths.
  • Aluminum oxalate solutions without nitrate resulted in reduced bond strengths.
  • Acidified aluminum oxalate solutions demonstrated the ability to dissolve NPG, simplifying the procedure.
  • Experimental materials achieved higher average bond strengths on dentin compared to commercial agents.

Conclusions:

  • Aluminum ions can effectively replace ferric ions in dental adhesive systems, yielding strong bonds.
  • A simplified procedure involving acidified aluminum oxalate, NPG, and PMDM shows promise for dental applications.
  • The experimental aluminum-based adhesive system outperforms some current commercial dentin bonding agents.